I can find some post‐’50s terms included in Fallout 1. If we accept the rule that the game must be written from a 1950s perspective, then this is clearly problematic. Some examples include:

  1. download
  2. downplay
  3. gigabyte
  4. scam
  5. sicko
  6. scumbag (pejorative sense)
  7. shithead
  8. suck (slang sense)
  9. wuss
  10. yucky

And this is by no means exhaustive.